updated the changelog
updated the changelog

latortuga/savon,savonrb/savon,Eric-Guo/savon,viniciusnz/savon,mpangrazzi/savon,billr578/savon,SICSoftwareGmbH/savon,zerobatu/savon,rtrepo/savon,BlaneCordes/savon_vertex,advishnuprasad/savon,enahum/savon,oafridi/savon